The voltages with any usb bus are always low to start with. I doubt you would see any changes made there at least no more then a few millivolts at that even.
A new board with 3.0 will be going into two new builds scheduled! The present case will see a few drives moved into it while this will be set aside simply as a spare running Vista most likely. The two new ones however will see 7 HP on one and of course Ultimate here!
(gee what about all these 2.0 usb flash drives hanging around now? hhmmm....